cody johnson disappeared july 7th. four days later, gram led friends and relatives to a popular spot in the park where they found johnson's body. >>> and susan boyle, you remember her. the soft-spoken scott charmed her way into our hearts when she became a reality tv sensation basically over night. ♪ i dreamed a dream of time gone by ♪ >> still gives me goosebumps. now the hit recording artist has made a major revelation. she told the observer newspaper she was diagnosed last year with the development disorder asperger's syndrome. this is significant because when she was a child, doctors said she suffered from brain damage. let's talk about this with our medical correspondent, elizabeth cohen. what is asperger's syndrome, and what does this mean for her as far as this revised diagnosis? >> asperger's syndrome is actually a form of autism, and people hear that and think, how could someone like her have autism? they have vision that someone with autism is completely unable to communicate. people with asperger's are h